package com.icngor.ch07;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class Test extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Test() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request,response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String name = request.getParameter("username");
		String vcode = (String) request.getParameter("vcode");
		String remember = request.getParameter("remember");
		String rand= Vcode.getVcode(request.getSession(true));
		boolean isCode = vcode.equals(rand);
		
		response.setContentType("text/html;charset=utf-8");
		PrintWriter out = response.getWriter();
		out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		out.println("  <BODY>");
		if(name.equals("wuerlang")){
			if(isCode){
				HttpSession session = request.getSession();
				session.setAttribute("username", name);
				response.sendRedirect("/jspBook/ch07/loginSuccess.jsp");
				
			}else{
				request.setAttribute("errorMsg", "验证码错误");
				RequestDispatcher rd = request.getRequestDispatcher("../ch07/loginError.jsp");
				rd.forward(request, response);
			}
				
		}else{
			request.setAttribute("errorMsg", "用户名或密码错误");
			RequestDispatcher rd = request.getRequestDispatcher("../ch07/loginError.jsp");
			rd.forward(request, response);
		}
		
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
